has anyone taken a opk test after ovulation and it started to get darker?

i’ve got heaps of ovulation test so I keep testing every day just to make sure maybe the test might have be wrong, I don’t know i just want to be in the safe side incase the other test was wrong 😅

but I’ve been taking one every day after my positive ovulation and it got really really faint to the point there was almost no line but now I’m 7dPO and it’s starting to get darker, it’s not a positive but it’s nowhere near as faint as it was three days ago